i diaste19.cm, a conical c vity ผู้{ Sanne..kegdiameter is hollo

1.	i diaste19.cm, a conical c vity ผู้{ Sanne..kegdiameter is holloued eut Find the trtol uduce area
Answer» It is given that, height (h) of cylindrical part = height (h) of the conical part = 7 cm Diameter of the cylindrical part = 12 cm ∴Radius (r) of the cylindrical part = 12/2 = 6cm ∴ Radius of conical part = 6 cm Slant (l) of conical part √r2 + h2 √36 + 49 √85 cm 9.22 cm(approx.) Total surface area of the remaining solid = CSA of cylindrical part + CSA of conical part + Base area of the circular part 2πrh + πrl + πr2 2 * 22/7 * 6 * 7 +22/7 * 6 * 9.22 + 22/7 * 6 * 6 264 + 173.86 + 113.14 551 cm Thanks

i diaste19.cm, a conical c vity ผู้{ Sanne..kegdiameter is holloued eut Find the trtol uduce area

Answer»

It is given that, height (h) of cylindrical part = height (h) of the conical part = 7 cm

Diameter of the cylindrical part = 12 cm

∴Radius (r) of the cylindrical part =

12/2 = 6cm

∴ Radius of conical part = 6 cm

Slant (l) of conical part

√r2 + h2

√36 + 49

√85 cm

9.22 cm(approx.)

Total surface area of the remaining solid

= CSA of cylindrical part + CSA of conical part + Base area of the circular part

2πrh + πrl + πr2

2 * 22/7 * 6 * 7 +22/7 * 6 * 9.22 + 22/7 * 6 * 6

264 + 173.86 + 113.14

551 cm

Thanks